Arcing fault and ground fault interrupting device for branch cir

Details Arcing fault and ground fault interrupting device for branch cir Arcing fault and ground fault interrupting device for branch cir

1998-07-10

2000-11-07

Leja, Ronald W.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Ground fault protection

H02H 300

Patent

active

061445371

ABSTRACT:
A fault detection device for an electrical distribution system employs a single arcing fault detection device which can be shared among a plurality of branch circuits. A scanning device is connected to the arcing fault detection device. A line conductor from each of the branch circuits is provided to the arcing fault detection device. A current transformer is provided for each branch circuit to monitor its line conductor and to provide an output signal to the scanning device. The scanning device polls each current transformer for an output signal for a selected number of cycles and provides the output signal to the arcing fault detection device. The arcing fault detection device analyzes the output signals and, upon detection of an arcing fault condition in a branch circuit, shunts the line conductor of that branch circuit to ground via a resistance to induce ground fault condition in the ground fault interrupting device for that branch circuit.

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